We're looking for an experienced, proactive Finance Assistant to join our growing team in Oxford. This is a unique opportunity to work closely with our UK Finance Director and play an integral role in supporting a fast-growing, innovative healthcare technology company.
About Caristo Diagnostics
Caristo Diagnostics is a global leader in AI technologies for cardiovascular disease, founded as a spin-out from the University of Oxford. Its award-winning technology helps detect hidden heart disease and identify people at risk of a heart attack before symptoms appear. Working with leading hospitals, research institutions, and pharmaceutical partners, Caristo aims to save lives through early detection and personalized prevention. The company was named a 2026 Technology Pioneer by the World Economic Forum in June 2026. Learn more at www.caristo.com or follow Caristo on LinkedIn, YouTube, and X.
About the CaRi-Heart® Technology
Named first of “7 Technologies That Could Change Heart Healthcare Forevermore” by the Robb Report, the CaRi-Heart® technology is Caristo’s flagship offering which uncovers hidden coronary inflammation, a key driver of cardiovascular disease, on routine Coronary Computed Tomography Angiography (CCTA).
The technology is regulatory-approved for commercial use in Europe and Australia, and is currently being piloted in several NHS sites. The CaRi-Heart Technology is also a receipt of the NHS AI award, and has been recognised by the British Heart Foundation as a game-changing innovation for preventing cardiovascular disease. Multiple patents underpinning CaRi-Heart technologies have been granted in major jurisdictions around the world. In addition, exceptional validation results showing CaRi-Heart’s ability to aid the prediction of heart attacks have been published in leading medical journals including the Lancet, JACC, European Heart Journal, and Cardiovascular Research.
About The Role
Job Title: Finance Assistant
Work Pattern: Part-time, expected 20-25 hours per week. Flexibility on hours Flexibility on in-office vs remote working, but expectation of every Wednesday in office.
Department: Administration, reporting to Finance Director in UK
Location: Oxford, UK
Responsibilities:
o Process supplier invoices, make payment runs, record receipts, process employee expenses, in all cases ensuring accuracy, approval, and timely payment.
o Assist with billing customers.
o Undertake bank reconciliation, and record any inconsistencies to help Finance Director reconcile inaccuracies.
o Assist Finance Director with preparing month-end accounts, and coordinate with external accountants as needed.
o General finance administration duties and identify discrepancies.
o VAT administration.
o Act as day-to-day point of contact for minor finance enquiries for UK employees on expense reimbursement, payroll, and supplier payment.
Skills & Experience Required:
o Proven experience with book-keeping.
o Relevant qualifications in accounting or finance is preferred, but not mandatory for applicants with more than 5 years of experience.
o Proficiency with accounting software – Dext, ApprovalMax, Xero or similar, SageOne, Xero and associated systems.
o Strong understanding of accounts payable and receivable processes.
o Strong proficiency in Microsoft Office, Outlook, Teams, and other business collaboration tools.
o Exceptional attention to detail and a commitment to delivering high-quality work.
o Strong organisational and time-management skills, with the ability to manage multiple priorities and shifting demands. o Excellent interpersonal and communication skills.
o Sound judgment, discretion, and the ability to handle sensitive and confidential information.
Benefits:
o Competitive salary
o 25 holidays per year plus bank holidays
o Enhanced pension contribution · Private medical insurance
o Life insurance
o Cycle-to-work scheme
o Additional benefits for long-service
Why join Caristo:
o Be part of a company at the cutting edge of medical technology, with the potential to save lives and revolutionise healthcare
o Join a dynamic and growing team, with opportunities for personal and professional growth
o Contribute to the development of groundbreaking products in a company poised for significant expansion
o Enjoy a supportive and collaborative work environment, with a strong emphasis on innovation, quality, and impact
Caristo Diagnostics is committed to diversity and inclusion, and encourages applications from all qualified candidates, including those making a step up in their career. If you are passionate about making a difference in the world of medical imaging and meet the above criteria, we would love to hear from you.
Applicants should request our Candidate Privacy Notice for information as to how we will handle your personal data.
Skills Required
- Proven bookkeeping experience
- Relevant accounting or finance qualification
- Proficiency with Dext, ApprovalMax, Xero, SageOne, or similar accounting systems
- Strong understanding of accounts payable and accounts receivable processes
- Strong proficiency with Microsoft Office, Outlook, Teams, and business collaboration tools
- Exceptional attention to detail and commitment to high-quality work
- Strong organizational and time-management skills
- Excellent interpersonal and communication skills
- Sound judgment, discretion, and ability to handle sensitive and confidential information
What We Do
Caristo Diagnostics has been formed to bring revolutionary cardiovascular diagnostic tools to patients worldwide. Our proprietary technology transforms the accuracy of routine cardiac CT scans by extracting new information that is otherwise invisible, greatly enhancing the power to predict cardiovascular risk and refine treatment decisions. Our Website: https://www.caristo.com Follow us on Twitter: https://twitter.com/CaristoHeart
